Expert physician researcher Sunil Wimalawansa explains why Vitamin D plays a critical role in immune system function, the physiology various forms of vitamin D and how to ensure you keep a level compatible with optimal health.Dr Sunil J. Wimalawansa, MD, PhD is a globally respected clinician-scientist, educator, over three decades of leadership in endocrinology, osteoporosis, metabolic bone disease, and nutrition. He served as professor and chief of endocrinology at leading U.S. medical institutions, including the Robert Wood Johnson Medical School/Rutgers University.CONSULT DR MAXInitial consult - https://www.drmaxgulhane.com/offers/5jfDvLyH/checkoutSUPPORT MY WORK🥩 WOLKI FARM. Highest quality fully grassfed & pastured pork, beef, lamb & eggs raised with holistic principles and shipped around Australia. Code DRMAX for 10% off. https://wolkifarm.com.au/DRMAX🚨 DAYLIGHT COMPUTER. Blue-light free computer that doesn't wreck your circadian rhythm. Now shipping around the world. Code DRMAX for $25 off.   https://buy.daylightcomputer.com/DRMAX🚨 VIVA RAYS. Premium blue light blocking glasses with the most useful 3 in 1 clip on frame sets. Code DRMAX for 15% off. https://vivarays.com/dr-maxgulhane🚨 GEMBA RED. Highest quality photobiomodulation / redlight therapy devices, shipping within the USA. Code DRMAX for 10% off. https://gembared.com🚨 CHROMA. Advanced photobiomodulation devices including D-light (Vitamin D-generating) & Lux vital with OPN3-5 stimulation, cold pillow for the ultimate night's sleep. Use code DRMAX for 11% off. https://getchroma.co/?ref=i6p39fn0🚨 MIDWEST RED LIGHT THERAPY. Blue blockers, photobiomodulation devices, shipping to USA. Code DRMAX for 10% offhttps://midwestredlighttherapy.com/affiliate/DRMAX🚨 BON CHARGE. Blue blockers, EMF laptop pads, circadian friendly lighting, and more. Code DRMAX for 15% off. https://boncharge.com/?rfsn=7170569.687e6d🎤 PRIVATE MEMBERS GROUP on Skool platform - weekly Q&A, my 52-page eBook, PDF resource downloads & more. USD20/month, cancel anytime.  https://www.skool.com/dr-maxs-circadian-resetTIMESTAMPS3:30 Vitamin D Metabolism Made Clear9:30 Sunlight Timing And Skin Production15:20 Peripheral Activation And Inactivation21:40 Immune Cells Depend On Daily Supply27:00 D3 vs Calcifediol vs Calcitriol33:20 Acute Illness, ICU, And Rapid Repletion39:30 Safety, Toxicity, And Hypercalcemia45:10 Disease Thresholds And Target Levels51:30 MS, Autoimmunity, And Latitude Clues58:00 Dosing Rules And Obesity Adjustments1:04:00 Frequency Matters More Than Mega Doses1:09:00 K2, Magnesium, And Cofactors1:14:00 Study Design Pitfalls And Bias1:21:00 Practical Takeaways And ResourcesREFERENCED PAPERSCalcifediol Treatment and Hospital Mortality Due to COVID-19: A Cohort Study PMID: 34064175 https://pubmed.ncbi.nlm.nih.gov/34064175/Follow DR WIMALAWANSAWebsite: https://wimalawansa.org/about-the-founder.htmlFollow DR MAXWebsite: https://drmaxgulhane.com/Private Group: https://www.skool.com/dr-maxs-circadian-resetCourses: https://drmaxgulhane.com/collections/coursesTwitter: https://twitter.com/MaxGulhaneMDInstagram: https://www.instagram.com/dr_max_gulhane/Apple Podcasts:  https://podcasts.apple.com/podcast/id1661751206Spotify:  https://open.spotify.com/show/6edRmG3IFafTYnwQiJjhwRLinktree: https://linktr.ee/maxgulhanemdDISCLAIMER: The content in this podcast is purely for informational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. Do not disregard professional mSend us a text